- Empire Oil & Gas Corporation, trading as the Colusa Products Co. at Berkeley, Calif., and against Chester Walker Colgrove, president and treasurer of the /corporation1
- F. W. Berk & Co., Inc., New York, N. Y1
- Flanders-Day Co., a corporation, Boston, Mass.1
- Fred N. Haas, trading as the Cel-Bio Mineral Food Co., Omaha, Nebr.1
- Gero Products, Inc.1
- Gotham Sales Co., Inc.1
- Gudebrod Brothers Co., Inc.1
- Harvey Laboratories, Inc., Philadelphia, Pa.1
- Hollings-Smith Co.1
- Howard-Iowa Products Co., a corporation, Jefferson, Iowa1
- Jamco Co.1
- John Francis Gorman, trading as the Vitaminerals Co., Los Angeles, Calif.1
- Joseph C. Winslow and Stephen R. Winslow, trading as the Mutual Products Co., Minneapolis, Minn.1
- Lambert Pharmacal Co.1
- Liebenthal Brothers Co., a corporation doing business under the name of the Mario Products Co., Cleveland, Ohio1
- Marsales Company, Inc.1
- McDonald Pharmacal Co., Inc., St. Paul, Minn., and Edmund L. McDonald1
- Price Compound Co.1
- Purity Drug Co., Inc.1
- Rubber Research Products Corporation1